Thread: response file question

-----Original Message-----
From: Mary Templeton [met<at>iris.washington.edu]
Sent: Friday, September 15, 2017 2:10 PM
To: Stickney, Mike <MStickney<at>mtech.edu>
Cc: Mary Templeton <met<at>iris.washington.edu>; PDCC
<pdcc<at>lists.ds.iris.edu>
Subject: Re: [IRIS][pdcc] response file question

Hi Mike,

If a location code changes, it’s practice to treat it like a new channel,
even if nothing changed in the hardware. This has happened a lot over the
history of the GSN. So you’d close out the old channel epoch
(2255.NP.EHZ.—) and open the new one to include the location code
(2255.NP.EHZ.0B).

You would open a new station _epoch_ if some of the information in
the SEED station blockette (50) had changed (e.g. lat/long). If a station
location changes by more than roughly 1 km (I believe that’s the correct
distance) you’d create a new station _name_ (i.e. rename the station).

cheers,
Mary

On Sep 15, 2017, at 1:35 PM, Mike Stickney <MStickney<at>mtech.edu>

wrote:

I'm using PDCC v3.8 to generate dataless seed files. For a station that I

record (not mine), the location code changed, but nothing else. Should I
treat this location code change as a separate station or a new epoch of the
same station?

Here is specific case: 2255.NP.EHZ.-- was changed to 2255.NP.EHZ.0B.
Thanks for any guidance. -Mike


Michael Stickney, Director
Earthquake Studies Office
Montana Bureau of Mines and Geology
Montana Tech of the University of Montana
1300 W Park St
Butte, MT 59701

(406) 496-4332 Voice
(406) 496-4451 Fax
mstickney<at>mtech.edu
http://mbmgquake.mtech.edu


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